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Ultra High strength, Seamless, Hot Rolled Hollow Sections from ISMT (conforming to EN 10210)

ISMT - UHS™ Structural Tubes Content

ISMT - UHS™ Structural Tubes Table related Content

Chemical analysis (%)

GRADE C Si Mn P S N
Specified
thickness( mm)
         
40
S235JRH 0,17 1,40 0,040 0,040 0,009
S275J0H 0,20 1,50 0,035 0,035 0,009
S275J2H 0,20 1,50 0,030 0,030
S355J0H 0,22 0,55 1,60 0,035 0,035 0,009
S355J2H 0,22 0,55 1,60 0,030 0,030
S355K2H 0,22 0,55 1,60 0,030 0,030

 

Carbon Equivalents (cev) %

GRADE For specified thickness mm
  16 16 40
S235JRH 0,37 0,39
S275J0H 0,41 0,43
S275J2H 0,41 0,43
S355J0H 0,45 0,47
S355J2H 0,45 0,47
S355K2H 0,45 0,47

 

Mechancial Properties

GRADE Min. Yield Strength (ReH) Mpa Tensile Strength Rm) MPa Elongation % Minimum Min Impact Strength
  Specified thickness mm/td> Specified thickness mm Specified thickness mm    
      Long. Transv. T°C J
  16 16 40 3 3 40 40 40    
S235JRH 235 225 360-510 360-510 26 24 20 27
S275J0H 275 265 430-580 410-560 23 21 0 27
S275J2H 275 265 430-580 410-560 23 21 -20 27
S355J0H 355 345 510-680 470-630 22 20 0 27
S355J2H 355 345 510-680 470-630 22 20 -20 27
S355K2H 355 345 510-680 470-630 22 20 -20 40

Chemical analysis (%)

GRADE C Si Mn P S Nb V Al tot. Ti Cr Ni Mo Cu N
S275NH 0.20 0.40 0.50-1.40 0.035 0.030 0.050 0.08 0.020 0.03 0.30 0.30 0.10 0.35 0.015
S275NLH 0.20 0.40 0.50-1.40 0.030 0.025 0.050 0.08 0.020 0.03 0.30 0.30 0.10 0.35 0.015
S355NH 0.20 0.50 0.50-1.40 0.035 0.030 0.050 0.12 0.020 0.03 0.30 0.50 0.10 0.35 0.020
S355NLH 0.18 0.50 0.50-1.40 0.030 0.025 0.050 0.12 0.020 0.03 0.30 0.50 0.10 0.35 0.020
S420NH 0.22 0.60 1.00-1.70 0.035 0.030 0.050 0.20 0.020 0.03 0.30 0.80 0.10 0.70 0.025
S420NLH 0.22 0.60 1.00-1.70 0.030 0.025 0.050 0.20 0.020 0.03 0.30 0.80 0.10 0.70 0.025
S460NH 0.22 0.60 1.00-1.70 0.035 0.030 0.050 0.20 0.020 0.03 0.30 0.80 0.10 0.70 0.025
S460NLH 0.22 0.60 1.00-1.70 0.030 0.025 0.050 0.20 0.020 0.03 0.30 0.80 0.10 0.70 0.025

 

Carbon Equivalents (CEV) %

GRADE Maximum Carbon Equivalent (CEV)
  For specified thickness mm
  16 16 40
S275NH 0.40 0.40
S275NLH 0.40 0.40
S355NH 0.43 0.43
S355NLH 0.43 0.45
S420NH 0.50 0.52
S420NLH 0.50 0.52
S460NH 0.53 0.55
S460NLH 0.53 0.55

 

Mechanical properties

GRADE Min. Yield Strength
(ReH) MPa
Tensile Strength
(Rm) MPa
Elongation % Minimum Minimum Impact Strength*
  Specified thickness mm Specified thickness mm Specified thickness mm T°C/ J
  = 16 16 = 40   Long. Transv.    
S275NH 275 265 370-510 24 22 -20 40
S275NLH 275 265 370-510 24 22 -50 27
S355NH 355 345 470-630 22 20 -20 40
S355NLH 355 345 470-630 22 20 -50 27
S420NH 420 400 520-680 19 17 -20 40
S420NLH 420 400 520-680 19 17 -50 27
S460NH 460 440 540-720 17 15 -20 40
S460NLH 460 440 540-720 17 15 -50 27

application in the construction of bridges, cranes, off-shore structures, buildings, ships and other structures where reduction of dead weight without any loss of load bearing capacity is critical.

Typical characteristics of these tubes are high yield strengths and good toughness with the guarantee of chemistry that is suitable for welding. Tubes are produced as per following chemical analysis that guarantee the required mechanical properties which generally conform to EN 10297 specifi cation.

CHEMICAL ANALYSIS (%)

C Mn vc P S Ni V Cr Mo
0.20 1.70 0.60 0.025 0.015 1.20 0.12 0.50 0.50

 

Mechanical Properties

GRADE TENSILE PROPERTIES IMPACT TEST*
  Rp02 (MPa) min Rm (MPa) min A % Charpy KV long. Charpy KV Trasv.
          long. min   (J min)  
  Wall thickness mm   Temperature
  20 20 40 20 20 40   -20 °C -50 °C -20 °C -50 °C
HS620 620                
HS690 690 650 770-960 720-930 16 55 - 27 -
HS770 770 700 820-1000 750-960 15 50 - 27 -
HS790 790                

circular hollow - sections

Outside Wall thickness                                  
Diameter Mm                                    
mm 8.0 2.6 2.9 3.2 3.6 4.0 4.5 5.0 5.6 6.3 7.1 8.0 8.8 10.0 12.5 16.0 20.0 30.0 40.0
21.3 1.08 1.20 1.32 1.43 1.57 1.71 1.86 2.01                      
33.7     2.20 2.41 2.67 2.93 3.24 3.54 3.88 4.26 4.66 5.07              
42.4     2.82 3.09 3.44 3.79 4.21 4.61 5.08 5.61 6.18 6.79 7.29 7.99          
48.3     3.25 3.56 3.97 4.37 4.86 5.34 5.90 6.53 7.21 7.95 8.75 9.45          
60.3       4.51 5.03 5.55 6.19 6.82 7.55 8.39 9.32 10.3 11.2 12.4 14.7        
76.1       5.75 6.44 7.11 7.95 8.77 9.74 10.8 12.1 13.4 14.6 16.3 19.6 23.7 27.7    
88.9         7.51 8.38 9.37 10.3 11.5 12.8 14.3 16.0 17.4 19.5 23.6 28.8 34.0    
101.6           9.63 10.8 11.9 13.3 14.8 16.5 18.5 20.1 22.6 27.5 33.8 40.2    
114.3             12.2 13.5 15.0 16.8 18.8 21.0 22.9 25.7 31.4 38.8 46.5 62.4  
139.7             15.0 16.6 18.5 20.7 23.2 26.0 28.4 32.0 39.2 48.8 59.0 81.2  
168.3               20.1 22.5 25.2 28.2 31.6 34.6 39.0 48.0 60.1 73.1 102 127
177.8                   26.6 29.9 33.5 36.7 41.4 51.0 63.8 77.8 109 136
193.7                   29.1 32.7 36.6 40.1 45.3 55.9 70.1 85.7 121 152
219.1                   33.1 37.1 41.6 45.6 51.6 63.7 80.1 98.2 140 177
244.5                       46.7 51.2 57.8 71.5 90.2 111 159 202
273.0                           64.9 80.3 101 125 180 230
Other outside diameter and wall thickness on request

circular hollow - sections

Size Wall thickness                              
mm Mm                                  
40x40 2.9 3.2 3.6 4.0 4.5 5.0 5.6 6.3 7.1 8.0 8.8 10.0 11.0 12.5 14.2 16.0 17.5 20.0
50x50 3.31 3.61 4.01 4.39 4.85 5.28 5.78 6.33 6.91                  
60x60 4.22 4.62 5.14 5.64 6.26 6.85 7.54 8.31 9.14 10.0                
70x70 5.13 5.62 6.27 6.9 7.67 8.42 7.30 10.3 11.4 12.5 13.5 14.9 15.9 17.3        
80x80   6.63 7.40 8.15 9.08 9.99 11.1 12.3 13.6 15.0 16.3 18.0 19.4 21.3        
80x80     8.53 9.41 10.5 11.6 12.8 14.2 15.8 17.5 19.0 21.1 22.8 25.2        
90x90     9.66 10.7 11.9 13.1 14.6 16.2 18.1 20.1 21.8 24.3 26.3 29.1        
100x100       11.9 13.3 14.7 16.3 18.2 20.3 22.6 24.5 27.4 29.7 33.0 33.6      
110x110       13.2 14.7 16.3 18.1 20.2 22.5 25.1 27.3 30.6 33.2 37.0 41.0      
120x120         16.1 17.8 19.9 22.2 24.7 27.6 30.1 33.7 36.6 40.9 45.5 50.1    
140x140           21.0 23.4 26.1 29.2 32.6 35.6 40.0 43.5 48.7 54.4 60.1 64.7  
150x150               28.1 31.4 35.1 38.4 43.1 47.0 52.7 58.9 65.2 70.2  
Other outside diameter and wall thickness on request               [Weight in kg/m]

ISMT- UHS structural tubes tolerance web content

TOLERANCES

Tolerances will be as per EN 10297 specifications.

Permissible deviation in external dimensions D, B and H ….±1% With a minimum of ±0.5mm.

Tolerance on wall thickness T …. -10% for Seamless section, local deviation of -12.5% are permissible.

Permissible out-of-roundness 0 ………….2% out-of-roundness is calculated using the following equation:

0(%) = Dmax – DMin    X 100
D

In the case of square USH sections, the wall thickness in the straight edge area must be checked the upper layer of the wall thickness is determined by the maximum weight.

Maximum Permissible deviation of squareness of sides ...± 1°

External Cornor Profile

C1 & C2 = max. 3T (wall thickness) the distance between the intersection of the fl at side and the corner arc and the intersection of the projections of the fl at sides to the corner C1 and C2 shall be measured

The maximum permissible twist V is calculated using the following formula: V =
2mm + 0.5mm/m

Permissible out-of-straightness = 0.2% related to the total section length, i.e.
2mm/m

Maximum mass tolerance per section = ±6%, ±8%.

ISMT - UHS™ Structural Tubes Table related LENGHT AND PERMISSIBLE DEVIATIONS Content

Type of length Available length(mm) Permissible deviation Ordering information re length
Mill length 6000 – 16,000 1) none
Fixed length 2,000 ±500 Required fixed length in mm
  2,000 –0 +10 Required fixed length in mm
  6,000    
  6,000 –0 +15  

 

All the steel grades indicated in this brochure have been specially developed so that they have a low carbon equivalent and are easily weldable using traditional welding procedures (provided generally accepted technical rules are followed). For very thick sections, precautions should be taken to avoid cold cracking. In such cases, pre-heating prior to welding is advisable.

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